TEMPONE-D16,1-15N;4-Amino-2,2,6,6-tetramethylpiperidine-d17;4-OXO-TEMPO-D16,1-15N;4-OXO-2,2,6,6-TETRAMETHYLPIPERIDINE-D16,1-15N-1-OXYL;4-oxo-tempo-D16-15N;4-Oxo-TEMPO-d16-15N,free radical;4-OXO-TEMPO-D16-15N, FREE RADICAL, 98 AT OM % D, 99 ATOM % 15N;4-oxo-tempo-d16,1-15n, free radical